Good static pressure is mistaken for sustained demand
A fictional water-supply record shows a high static reading but a substantial pressure drop during the supplied flow condition. An owner argues that the high no-flow number proves every sprinkler demand is met. A separate worksheet calculates density times area but omits its stated allowance and required duration. The relevant water source and valve positions are unverified, and no actual live test or pump operation occurs here. Separate static pressure, sustained flow, total stated demand and storage duration, then explain how actual source, valve, pump, pipe and hydraulic evidence affects the assessment without inventing a universal Chinese minimum pressure or acceptance test sequence.
1. Which pressure conclusion is unsupported?
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High static pressure alone does not establish adequate residual performance at the actual required flow.
2. What must the calculation preserve?
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The supplied density, area, allowances, units and duration, followed by the actual complete applicable source and hydraulic assessment.